Northampton - Republican photo by Michael Beswick - Emergency personnel in Northampton respond to the YMCA in Northampton on Saturday during the heavy rain. Workers clearing the roof heard a loud crack, which was followed by the entire building shaking.

NORTHAMPTON- The Hampshire Regional YMCA had to be evacuated Saturday afternoon after a loud bang was heard and the building shook, a firefighter said.

The firefighter said snow was being removed from the roof at the Prospect Street building when the incident happened. The call about the noise came in at approximately 2:30 p.m.

The incident is still under investigation, and an engineer is being called to the scene, the firefighter said. No injuries were reported.

The recorded greeting at the YMCA said the building was closed as a precaution.